Apparatus for purifying air.



(Application filed May 29,' 1899-.)

mm wy mm' No. s99,|6.6. l l Patented may 6, |9112,

Y D. GnovE.

APPARATUS FUR PURIFYING AIR.

(Application led May 29, 1899,) V y (No Model.)A l 2 Sheets-Sheet 2.

Tus Nonwls PETERS co, PnoTauTHu., wAsmNomN, n c.

.iso

, UNITED STATES PATENT C)intron.`

DAVID GROVE, OF BERLIN, GERMANY.

I APPARATUS FOR PURIFYINGAIR.

SPECIFICATION forming part of Letters Patent No. 699,166, dated May 6,'1902. Application tiled May 29| 1899.' Serial No. 718;736. (NoV model.)

ing, Ventilating, and otherv industrial plants.

or establishments. It can also at the same time be used, if necessary, for cooling and saturating the air with water.

The apparatus consists, essentially,of cloths stretched over angular frames, which former admit of freedom of movement to the air and act as a purifier by repeatedly breaking or interrupting the air-current, the impuritiesv of the air being deposited on the cloths, which are preferably kept constantly moist or wet.

The apparatus does not act as a filter, sinceY it does not compel the air to pass through the narrow meshes of filter-cloths, which, according to-eXperience, are soon choked up byimpurities, resulting not only in annulling the effect of the filter, but also in creating doubt las to the efficiency of the whole apparatus.

Referring to the accompanying drawings, Figure 1 is a front elevation of the apparatus supposed to be constructed in a wallediu passage, the wet cloth, with the upper wa-V ter-receptacle, being omitted. Fig. 2 is a plan of same, the upper water-receptacle supposed to be removed and the cloths being shown in section. Fig. 3 is a partly longitudinal section and partly side elevation of the apparatus, some parts supposed to be broken o in order to show others more distinctly. Fig. 4

is a cross-section through the apparatus Without cloth and stretching frames. Figs. 5 and 6 are plan and sidey elevation, respectively, of one of the angular frames by which the cloths are held tight.

The apparatus consists of a frame c, arranged within the channel or passage through which the air passes, sothat the same is compelled to pass also through the apparatus. In the frame there are secured above and below rails or bars b, of angular iron, whose vertical stays are provided with indents or is secured, as shown in Fig. 3, to the outermost lower frame d, conducted therefrom upwardly over the outermost upper angular frame, then conducted below again and put around the nextlower angular frame, and so on alternately overrthe upper and lower angular frames, so that the free coursesor tracks of the cloth form'angular spaces or slots through which the air must pass. The air-current is thus repeatedly broken, and the impurities of the air remain adhering to the courses or tracks in which the cloth passes. This purifying action of the apparatus is still increased it' the cloth-tracks are kept always'moist or wet. For this purpose a trough-shaped receptacle vor vessel g is provided above the frame a, such vessel being kept filled with water-up to a certain level automatically by means of, for instance, the known floating-ball valve h. The vessel g is lined with cloth i of loose mate'- rial, Whichis passed or fed over the edges of the trough and placed with its edges on the portions of cloth f surrounding the angular frames d. The cloth t' is preferably put around bars j, adapted for guiding or stretching it. y

The loose cloth@l sucks itself full with the water in the trough g and constantly gives off water at its lower edges to the cloth f, so that the impurities left on the latter are washed down. y

Good results are also obtained `with the apparatus without wetting the cloth f. The water therefore can be shut o in frosty weather unless it is preferred to warm the air before it reaches the apparatus. The space above the frame c, carrying the'cloth f, is shut off in the direction ofjthe air-current by a fiap or folding door 7c, Fig.' 4 so that the entire air mu t pass through the slots between the clothf racks. Y'

Having now particularly described and as- IOO to the air-channels and a olothimmersed in the vessel, the edges of such cloth beingr located on the air-purifying material, as and for the purpose described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

DAVID GROVE.

IVitnesses:

WOLDEMAR HAUPT, HENRY HASPER. 

